К подлежащему:
Who came to visit him one day?
Специальный вопрос:
When did his cousin from (пропущено откуда) come to visit him?
Общий:
Did his cousin from (London/Kolpino/...) come to visit him one day?
Объяснение:
К подлежащему:
Who came to visit him one day?
Специальный вопрос:
When did his cousin from (пропущено откуда) come to visit him?
Общий:
Did his cousin from (London/Kolpino/...) come to visit him one day?
Объяснение: